Carrier COBRA 48/50HJ004-014 - Manual (Page 24)

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Table 1G — Electrical Data (COBRA™ Energy Recovery 48HJ008-014 Units with 62AQ300)
LEGEND
*Used to determine minimum disconnect per NEC.
†Single point box CRSINGLE017A00 is part of base unit.
NOTES:
1. In compliance with NEC requirements for multimotor and combi-
nation load equipment (refer to NEC Articles 430 and 440), the
overcurrent protective device for the unit shall be fuse or HACR
breaker. UL, Canada units may be fuse or circuit breaker.
2. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply volt-
age is greater than 2%. Use the following formula to determine
the percent of voltage imbalance.
Example: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
= 457
Determine maximum deviation from average voltage.
(AB) 457 – 452 = 5 v
(BC) 464 – 457 = 7 v
(AC) 457 – 455 = 2 v
Maximum deviation is 7 v.
Determine percent of voltage imbalance.
% Voltage Imbalance = 100 x
= 1.53%
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.
UNIT
NOMINAL
V-PH-Hz
IFM
TYPE
CONV
OUTLET
62AQ
FLA
POWER SUPPLY DISCONNECT SIZE*
MCA
FUSE OR
HACR BKR
FLA LRA
48HJ008
208/230-3-60
STD NO 29.8 68.0 80 75 420
STD YES 29.8 74.0 80 80 425
HIGH STATIC NO 29.8 71.1 80 78 445
HIGH STATIC YES 29.8 77.1 80 84 449
460-3-60
STD NO 15.8 35.0 40 38 211
STD YES 15.8 37.7 40 41 213
HIGH STATIC NO 15.8 36.4 40 40 224
HIGH STATIC YES 15.8 39.1 45 43 226
48HJ009
208/230-3-60
STD NO 29.8 70.0 80 77 454
STD YES 29.8 76.0 80 82 459
HIGH STATIC NO 29.8 73.1 80 80 479
HIGH STATIC YES 29.8 79.1 80 86 483
460-3-60
STD NO 15.8 37.3 40 41 233
STD YES 15.8 40.0 45 43 235
HIGH STATIC NO 15.8 38.7 45 42 246
HIGH STATIC YES 15.8 41.4 45 45 248
48HJ012
208/230-3-60
STD NO 29.8 82.8 90 90 519
STD YES 29.8 88.8 100 96 523
HIGH STATIC NO 29.8 87.2 100 95 542
HIGH STATIC YES 29.8 93.2 100 101 547
460-3-60
STD NO 15.8 40.7 45 44 261
STD YES 15.8 43.4 45 47 263
HIGH STATIC NO 15.8 43.3 50 47 272
HIGH STATIC YES 15.8 46.0 50 50 274
48HJ014
208/230-3-60
STD NO 29.8 90.4 100 98 604
STD YES 29.8 96.4 100 104 609
460-3-60
STD NO 15.8 44.9 50 49 297
STD YES 15.8 47.6 50 51 299
FLA — Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
IFM
— Indoor (Evaporator) Fan Motor
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
NEC
— National Electrical Code
UL — Underwriters’ Laboratories
= 100 x
max voltage deviation from average voltage
average voltage
Average Voltage =
452 + 464 + 455
3
=
1371
3
IMPORTANT: If the supply voltage phase imbalance is more than
2%, contact your local electric utility company immediately.
7
457